Analysis of the Construction and Formation for the Giant Inclined Arch and Long-Span Truss Roof of Xiamen New Stadium

The stadium roof of Xiamen New Sports Center is mainly composed of giant arches， connecting grid frames， roof trusses， and facade curtain wall supporting structures， etc. Two giant arches are arranged from south to north， and a connecting grid is arranged between them. The main truss is arranged from east to west， supported by the giant arches and the slanted columns of the stands； the east and west facades are equipped with curtain wall supporting structures. The main installation idea of the roof is “first the main structure， then the secondary structure， and finally the curtain wall structure”. Compared with the final formed structure， the structure’s geometry， load-transfer system， stiffness， boundary constraints， and load actions have been changing during the construction and forming processes， and the corresponding structure’s displacement and stress have also been changing continuously. The stress on some oblique struts at the temporary support points of the connecting grid is too large， and reinforcement measures need to be taken. After the installation is completed， small additional stresses and additional deformations are locally produced in the structure， which have little impact on the bearing capacity and normal use of the structure. This analysis can be used to judge the mechanical rationality of the roof installation scheme， provide a theoretical basis for the preparation of the construction scheme， and serve as a reference for the construction mechanics design of similar projects in the future.